granat



E. GHANAT.

SEARCH LIGHT APPARATUS. APPLICATION msn Dic. 22. 1911.

Pelltd May 13, 1919.

- 2 sHEHs-sHEET l ZycfLe-s S exs f :mms Ferns um, swam-umm w E, GRANAT.

SEARCH LIGHT APPARATUS. APPLIcATmN'HLEn mac. 22. 1911.

Patented May13,1919.

2 SHEETS-SHEET 2.

l'/ lll w: NeR/us persas co., Pumauruo.. wAsHlNsroN. IJ cy r NTTEDsTATEs PATENT oEEioE.

ELIE GRANAT, 0F PARIS, FRANCE, ASSIGNOROF ONE-HALF 'I'O BENARD BARBIER &TURENNE, OF PARIS, FRANCE, A FIRM.

SEARCH*LIG-I:IT APPARATUS.

Specification of Letters Patent.

Patented May 13, 1919.

Application filed December 22 1917. Serial N o. 208,482.

To all whom 'it may concern:

Be it known that I, Enne GRANAT, a c1t1- zen of Russia, residing atParis, France, have invented Improvements in Search- Light Apparatus, ofwhich the following 1s a specification.

This invention has reference. to search light apparatus and has for itsobject to provide improved mechanism for effecting the horizontal andvertical movements of the luminous rays in order to direct them inhorlzontal and vertical searching and pointing operations.

The improved mechanism 1s so constructed and arranged that operation ofthe mechanism to effect adjustment of the luminous rays in a horizontalplane does not cause any alteration in the vertical adjustment lof the.V

luminous rays.

For this purpose according to the invention an irreversible unit of themechanism` for vertically adjusting the luminous rays is arranged uponthe movable part of the apparatus in such a way that the adjustment ofthe luminous rays in a horizontal plane has no other effect upon themechanism for` adjustment of the rays vertically than to cause thecontrolling hand wheelof thev vertical adjusting mechanism to rotatewithout however the axis of the luminous rays being displaced inaltitude.v

The accompanying drawings show a oonstruction of search lightapparatusembodying the invention merely' by way of demonstrative but notrestrictive example.

Figures 1 and la, read together, illustrate the apparatus in verticalsection following planes passing, as to the left half of the figure,through the axis of the hand wheel controlling the vertical adjustmentof the rays and, as to the right half, through the axis of the clutchmechanism for throwing the mechanism controlling the horizontaladjustment out of gear, parts of the apparatus being removed or brokenaway for the sake of clearness.

Fig. 2 is a sectional plan ofl part of the mechanism for controlling thehorizontal adjustment of the rays.

Figs. 3 and 4f showin vertical section oo rresponding to the line 3 3 ofFig. 4 and in horizontal section according to the line 4 4: of Fig. 3respectively parts of the mechanism for controlling the verticaladjustment of the ra s.

li, Fig. 1a shows the base or mounting of the apparatus in which in theusual manner, there is arranged to rotate about a vertical central aXis,a sleeve Z) to which is rigidly liXed an upper movable plate o thatcarries the bracket or bifurcated stirrup al in the arms of which theprojector e can turn about a horizontal axis, on two pivots of whichonly one is shown at el. Only a small part of the projector c is shown.

Direction of the luminous rays in a hori zontal plane is controlledthrough gearing comprising an irreversible transmission gear unit, bymeans of a hand wheel f, Fig. 2. The said gearing comprises toothedpinions f1 f2, engaging one into the other, a worm f3, Fig. la, keyedupon the shaft of the pinion f2 and engaging with a worm wheel 7* Xedupon a vertical shaft f5, and a toothed pinion f6 gearing into a ring ofteeth c1 ixed tothe movable plate c.

A cone clutch g is mounted on the shaft f5 and adapted to be actuatedfrom the eX- terior by means of a bell crank lever g1 which is rocked bya screw g2 that is rotated in a part forming a fixed screw nut by meansof ahand wheel g3. The worm wheel f* can consequently be disconnected atwill from the shaft f5 in order that large and rapid displacements of anangular nature can lbe given to theluminous rays for the preliminarysearch for the direction of an object, the final or exact delinement orpointing being effected by operating the hand wheel f after havingrengaged the worm wheel f4 with the shaft f5.

Controlling the height of the luminous rays is effected by means ofgearing comprising an irreversible transmission unit, certain elementsof such gearing being on the stationary part of the apparatus, and theothers being mounted upon that part of the apparatus which carries theprojector and is movable in a horizontal plane. This gearving isarranged in the following manner unit comprising a worm and worm wheelinclosed within a casing j mounted on the movable plate 0, (see Figs. 1,8 and 4) Upon the shaft carrying the bevel wheel is keyed a worm 1, Fig.3, gearing into a worm wheel 2 fixed upon a shaft on which is also keyeda lbevel wheel 3. The bevel wheel 3 gears into a bevel wheel 4 the shaftof which transmits through shafts 5, 6 and Cardan joints 7, 8 movementto a bevel pinion 9 that gears into a toothed bevel sector e2 lixed uponthe pivot el of the cylinder projector e of the search light (seeFig. 1) The jointed shafts 5 or 6 are located within the bracket orbifurcated stirrup cl and consequently protected against dust and rain.

A cone clutch 7c similar to the disconnecting gear g of the mechanismfor controlling the horizontal pointing of the searchlight and adaptedto be manipulated from the outside by means of a hand wheel k1, enablesthe bevel pinion 9 to be disengaged at will from the shaft 6, for thepreliminary searching-movements of the rays.

The hereinbefore described arrangement of the height controllingmechanism alfords the great advantage of preventing the altitude of therays from being interfered with when the apparatus is being moved forhorizontal adjustment or searching. As a matter of fact as theirreversible unit worm 1 and worm wheel 2 is arranged on the movableplate c of the apparatus, the bevel wheel when the horizontal adjustmentcontrol mechanism is in use, carries around the bevel wheel 71,6 and,through the parts h6, h5, h, 72.3, 71,2, h1 of the.transmission gearing,rotates the controlling hand wheel z, of the vertical adjustment controlmechanism. In horizontal movements therefore, the hand wheel h rotateswithout however the axis of the Aluminous rays undergoing anydisplacement as regards altitude.

The control handwheels f and 71, each are, or may be, fitted with asprocket rim to permit of a chain drive operated from. the ground ifdesired for elfectin the adjusting movements both for direction andheight. The chains may, moreover have special links. arranged atdistances apart corresponding to one turn of the hand wheels so thatthe-amount of movement may be easily distinguished by touch at nighttime.y I

It will be readily-understood that the invention is not strictly limitedto the exact arrangements hereinbefore described and shown in theaccompanying drawings, but that the structuraldetails may be variouslymodiiied; in practice according to circumstances.

What I claim iszl. In searchlight apparatus, a stationary part, anangularly movable portion, mechanism for moving said movable pai't tomove the luminous rays about horizontal planes, and mechanism for movingthe luminous rays vertically comprising an irreversible unit arrangedupon the movable port-ion of the apparatus and a shaft for actuatingsaid unit, said shaft being mounted to rotate in the stationary part ofthe apparatus about an axis coincident with the axis of said movableportion, so that horizontal adjustment does not aifect the altitude ofthe luminous rays.

'2. In searchlight apparatus, a stationary mounting, a projector, orcarrier in which said projector is mounted to rock vertically, saidcarrier being mounted to rotate in a horizontal plane on said mounting,a centrally arranged shaft arranged to rotate in said mounting, meanscarried by said mounting adapted to rotate said shaft. a bevel wheel onthe upper end of said shaft, a bevel pinion gearing into said bevelwheel and carried in bearings fixed to said carrier, transmission gearmounted on said carrier including an irreversible unit connecting saidbevel pinion to said projector and adapted to rock said projector, andmeans for rotating said carrier on said mounting.

3. lSearchlight apparatus, comprising a iixed mounting, a carriermounted to rotate in a horizontal plane on saidmounting, a projectormounted to rock in said carrier, gearing carried by said mounting forrotating said carrier, gearing partly arranged in said mounting andpartly arranged in said carrier for rocking said projector, said lastnamed gearing includingy an irreversible unit, and independent means onsaid mount.- ing for operating each of saidgearings.

4. Search light apparatus as claimed in claim ly comprising a clutch`vassociated with each of said mechanisms, and operating means for saidclutches.

5. In search light apparatus, a fixed mounting, a vertical sleevemounted to rotate in said mounting, a plate xed to the to of saidsleeve, a stirrup shaped bracket Xed on said plate, a projector pivotedin the arms of said bracket, a vertical shaft mountedito rotate in saidsleeve, a bevel wheel fixed to the lower end of said shaft, means onsaid mounting for rotating said vertical shaft, means on said mountingfor rotating said plate and carrier, a bevel wheel at the top of saidvertical shaft, and gearing mounted in said bracket including anirreversible unit between the said bevel wheel at the top of said shaftand said projector, substantially as described.

Signed at Pars, France, this 23d day of November, 1917.

ELIE GRANAT.

Copeaothlis patent may be kobtained for ve cents each, by. addressingthe "Commissioner of Patents,

` Washington, D. 0.

